netresearch/data-tools
skills/data-tools/SKILL.md
Use when querying, transforming, filtering, converting, or editing ANY JSON, JSONL, YAML, TOML, XML, or CSV. MUST replace grep/sed/awk on structured formats.
tools
Updated May 29, 2026
$ install --global
skillsauthnpx skillsauth add netresearch/data-tools-skill data-toolsInstall this skill globally with one command. Works with Claude Code, Cursor, and Windsurf.
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TrivyContainer and dependency vulnerability scanner
95%
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SemgrepStatic code analysis for vulnerabilities
95%
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mcp-scan (Snyk)Model Context Protocol security validation
95%
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Snyk (dep)Open source security scanning
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Socket.devSupply chain security analysis
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Last scanned: May 29, 2026, 6:44 AM144.3s7 files scanned
SKILL.md
- name:
- data-tools
- description:
- Use when querying, transforming, filtering, converting, or editing ANY JSON, JSONL, YAML, TOML, XML, or CSV. MUST replace grep/sed/awk on structured formats.
- license:
- (MIT AND CC-BY-SA-4.0). See LICENSE-MIT and LICENSE-CC-BY-SA-4.0
- compatibility:
- Requires jq, yq. Optional: dasel, qsv, mlr.
- author:
- Netresearch DTT GmbH
- version:
- 1.5.0
- repository:
- https://github.com/netresearch/data-tools-skill
- allowed-tools:
- Bash(jq:*) Bash(yq:*) Bash(dasel:*) Bash(mlr:*) Read Write
Data Tools Skill
Critical Rule
NEVER use grep, sed, or awk on JSON, JSONL, YAML, TOML, XML, or CSV. Refuse and use the correct tool — text tools break on multi-line values, nesting, and quoted delimiters.
Tool Selection
| Format | Tool | Notes |
|-------------|------------|------------------------------------------|
| JSON | jq | Or gh --jq for GitHub CLI |
| JSONL | mlr | Record-stream + DSL |
| YAML | yq | In-place via -i |
| TOML | dasel | Only native TOML tool |
| XML | dasel | Or xmlstarlet for XPath |
| CSV / TSV | qsv | Or mlr for cross-format / DSL |
| Multiple | dasel | Universal auto-detect |
Convert: dasel -w FORMAT, yq -o FORMAT, or mlr --icsv --ojson cat.
Key Patterns
jq -- JSON (no in-place)
jq -r '.version' package.json
jq '.users[] | select(.role == "admin") | .name' users.json
jq '.version = "2.0.0"' pkg.json > pkg.json.tmp && mv pkg.json.tmp pkg.json
jq -s '.[0] * .[1]' base.json override.json
yq -- YAML (in-place -i)
yq '.services.web.image' docker-compose.yml
yq -i '.services.app.image = "node:20"' docker-compose.yml
yq -o json config.yml
dasel -- TOML / XML / Universal
dasel -f Cargo.toml '.package.version'
dasel put -f config.toml -t string -v "2.0" '.project.version'
dasel -f input.json -w yaml
qsv -- CSV / TSV
qsv headers data.csv && qsv stats data.csv --everything | qsv table
qsv search -s status "active" users.csv | qsv select name,email
qsv join user_id orders.csv id users.csv
qsv index big.csv && qsv sample 1000 big.csv
mlr -- JSONL / multi-format / DSL (in-place -I)
mlr --c2j cat data.csv # also: --c2t, --j2c
mlr --jsonl filter '$level == "error"' logs.jsonl
mlr -I --csv put '$total = $qty * $price' orders.csv # also: stats1, join, sort
GitHub CLI -- always --jq
gh api repos/owner/repo/releases/latest --jq '.tag_name'
gh pr list --json number,title --jq '.[] | [.number, .title] | @tsv'
Anti-Patterns
# BAD → GOOD: jq -r '.version' package.json
grep '"version"' package.json | sed 's/.*"\(.*\)".*/\1/'
# BAD → GOOD: yq -i '.services.app.image = "node:20"' compose.yml
sed -i 's/image: node:.*/image: node:20/' docker-compose.yml
# BAD → GOOD: qsv select 2 data.csv
awk -F',' '{print $2}' data.csv
References
| Cookbook | Content | |---------|---------| | jq Cookbook | Filtering, transforms, GitHub CLI | | yq Cookbook | Actions, Compose, K8s | | dasel Cookbook | TOML/XML, conversion | | CSV Processing | qsv workflows, joins | | mlr Cookbook | JSONL, DSL, stats, joins |
Docs: jq, yq, dasel, qsv, mlr.
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